<template>
  <Dialog :title="dialogTitle" v-model="dialogVisible">
    <el-form ref="formRef" :model="formData" :rules="formRules" label-width="100px" v-loading="formLoading">
      <el-form-item label="部门编号" prop="departId">
        <el-select v-model="schoolId" placeholder="请选择学校" @change="changeSchool" style="width: 140px;">
          <el-option v-for="item in schools" :key="item.id" :label="item.schoolName" :value="item.id" />
        </el-select>
        <el-select v-model="departId" placeholder="请选择部门" style="width: 140px;" @change="changeDepart">
          <el-option v-for="item in departs" :key="item.id" :label="item.departName" :value="item.id" />
        </el-select>
        <el-input v-model="formData.departId" hidden />
      </el-form-item>
      <el-form-item label="专业名称" prop="majorName">
        <el-input v-model="formData.majorName" placeholder="请输入专业名称" />
      </el-form-item>
      <el-form-item label="专业介绍" prop="description">
        <Editor v-model="formData.description" height="150px" />
      </el-form-item>
    </el-form>
    <template #footer>
      <el-button @click="submitForm" type="primary" :disabled="formLoading">确 定</el-button>
      <el-button @click="dialogVisible = false">取 消</el-button>
    </template>
  </Dialog>
</template>
<script setup lang="ts">
import { MajorApi, MajorVO } from '@/api/td/major'
import { SchoolApi, SchoolForSelectVO } from '@/api/td/school'
import { DepartmentApi, DepartmentForSelectVo } from '@/api/td/department'
import { useSystemStore } from '@/store/modules/system'
/** 专业 表单 */
defineOptions({ name: 'MajorForm' })
const systemStore = useSystemStore()//系统状态库的实例
const { t } = useI18n() // 国际化
const message = useMessage() // 消息弹窗
// import eventBus from '@/api/event/event-bus';
const dialogVisible = ref(false) // 弹窗的是否展示
const dialogTitle = ref('') // 弹窗的标题
const formLoading = ref(false) // 表单的加载中：1）修改时的数据加载；2）提交的按钮禁用
const formType = ref('') // 表单的类型：create - 新增；update - 修改
const formData = ref({
  id: undefined,
  departId: undefined as number | undefined,
  majorName: undefined,
  description: undefined,
})
const schools = ref<SchoolForSelectVO[]>([])//学校的下拉列表的数据
const departs = ref<DepartmentForSelectVo[]>([])//部门的下拉列表的数据
const schoolId = ref(undefined);//学校的id
const departId = ref(undefined)//部门的id
//表单的校验规则
const formRules = reactive({
  departId: [{ required: true, message: '部门编号不能为空', trigger: 'blur' }],
  majorName: [{ required: true, message: '专业名称不能为空', trigger: 'blur' }],
})
const formRef = ref() // 表单 Ref

/** 打开弹窗 */
const open = async (type: string, id?: number) => {
  dialogVisible.value = true
  dialogTitle.value = t('action.' + type)
  formType.value = type
  resetForm()
  // 修改时，设置数据
  if (id) {
    formLoading.value = true
    try {
      formData.value = await MajorApi.getMajor(id)
      // 获取部门信息并设置学校和部门的回显
      if (formData.value.departId) {
        const department = await DepartmentApi.getDepartment(formData.value.departId)
        if (department) {
          schoolId.value = department.schoolId
          // 然后设置部门ID
          departId.value = department.id;
          // 先加载该学校下的所有部门
          await getDepartmentForSelect(department.schoolId)
        }
      }
    } finally {
      formLoading.value = false
    }
  }
}

defineExpose({ open }) // 提供 open 方法，用于打开弹窗

/** 提交表单 */
const emit = defineEmits(['success']) // 定义 success 事件，用于操作成功后的回调
const submitForm = async () => {
  // 校验表单
  await formRef.value.validate()
  // 提交请求
  formLoading.value = true
  try {
    const data = formData.value as unknown as MajorVO
    if (formType.value === 'create') {
      await MajorApi.createMajor(data)
      message.success(t('common.createSuccess'))
    } else {
      await MajorApi.updateMajor(data)
      message.success(t('common.updateSuccess'))
    }
    dialogVisible.value = false
    // 触发 store 版本更新
    await systemStore.refresh()
    emit('success')
  } finally {
    formLoading.value = false
  }
}

/** 重置表单 */
const resetForm = () => {
  formData.value = {
    id: undefined,
    departId: undefined,
    majorName: undefined,
    description: undefined,
  }
  schoolId.value = undefined
  departId.value = undefined
  formRef.value?.resetFields()
}

/** 获取学校下拉列表的数据 **/
const getSchoolsForSelect = async () => {
  const data = await SchoolApi.getSchoolsForSelect();
  schools.value = data
}

// 当学校发生变化时，重新加载部门列表
// 当学校发生变化时，重新加载部门列表
const changeSchool = async (id) => {
  await getDepartmentForSelect(id)
  // 自动选择第一个部门（如果存在）
  if (departs.value.length > 0) {
    departId.value = departs.value[0].id
    formData.value.departId = departs.value[0].id
  } else {
    departId.value = undefined
    formData.value.departId = undefined
  }
}

// 当部门发生变化时，设置部门ID
const changeDepart = async (id) => {
  formData.value.departId = id
}

// 通过学校ID获取部门列表
const getDepartmentForSelect = async (schoolId: number) => {
  const data = await DepartmentApi.getDepartmentsBySchoolId(schoolId);
  departs.value = data
}
//初始化加载学校的下拉列表
onMounted(() => {
  getSchoolsForSelect()
})

</script>
